专利名称：PROCESS FOR THE MANUFACTURE OF
AROMATIC ISOCYANATES USINGOXYETHYLATE CATALYSTS
发明人：ARNDT O,DT,SEMLER G,DT,SCHAEFFER G,DT申请号：US21738472申请日：19720112公开号：US3835172A公开日：19740910
摘要：Improved process for the preparation of aromatic isocyanates by reaction ofphosgene with primary aromatic amines or their salts in a suspension in an inert solvent,in which the reaction is carried out in the presence of catalytic amounts of a compoundcontaining at least 6 polyethylene oxide groups in one chain. By the addition of saidcompound the required amount of phosgene is reduced, the reaction proceeds fasterand the isocyanates are obtained in higher yields.
申请人：HOECHST F AG,DT
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